Traction-wheel.



W. L. MARTIN. TBACTION WHEEL. APPLICAI'ION.FILEDl JAN.16, 1907.

Patented 001;. 27, 1908 mmunmrmnmnmf W JWM@ 76. //WX M4.. Mmm

- then be gradually ing may be members movable in respect. l .15

tenrolt' pivotall)v connected links between each two of pairs of'said bearing members t-o which eaeli member ot' the pair-is' pivotallv eonneeted andwhieh is in turn pivotall)v earried-- by the rotatable frame. and posit-ive motion transmittii'ngr means between corre`- spending parts of said li-nk systems for causing the systemsto operate synchronously.- whereby the transfer ot weight from one memberto its adjacent member acts to maintain anyv two of said members in a straight line which is at a substantially constant distance from the center of the wheel.

2. In a wheel. a frame. a series ot' sectorslnounted thereon, movable bearing members connected to said sectors, and motion transmitting means for said sectors whereby a plurality of said bearing members are maintained in aline substantially tangent to the peri hery of said wheel, while said bearing mein ers Carr)Y the weight of the wheel; 3.' In a wheel, a frame. a .plurality ot' rods carrying bearing members movable substantiall radially relatively to said frame, and yiel ing means for' permittine` said rods to also move in a line snbstantia'll" parallel to the axis of the wheel.

4. in a' wheel, a frame, a series of movable sectors mountedA eoncentrieallv thereon` spokes carrying bearing disks at their free ends, and a central gear meshing with each of said sectors, the spokes being connected to' the sectors and adapted to impart an oscillatory motion thereto.

.3. In a wheel, a frame, a series of movable sectors mounted coneentrieall'y thereon, spokes connected to said seetors and earrying bearing disks at their free ends, links connecting al1 intermediate kpoint ot' each otl said spokes to the periphery of the -wheel trame, and means for connecting said sectors each to each.

t3. In a wheel, a frame. a housing mounted eoncentrieally on said frame. a series of toothed sectors pivoted in said housing. a gear meshing with each of said sectors; movable spokes connected to said see-tors and having bearing disks at their opposite ends, and links connecting intermediate points of said spokes to the peripher)v of the Wheel trame.

T. ln a wheel. a rotatable frame. bearing members movable in respect' thereto, and motion transmitting means interconnecting all ofthe bearing'members, whereby the relative movement of the bearing members is such that at certain positions the bearing memberslie ina series of straight lines, eaeh straight line passing through three adjacent bearing members. y

Q. In a wheel, the combination of a rotaltable frame, bearing members movable with respect thereto and ymotion tiainsinitting means between one bearing member and another bearing member bearing sneh relation to the former bearing member that theuformer is in engagement with the ground on the advancing side of the wheel when the latter is in engagement with the ground on the rear side-ot' the wheel. the motion transmitting means being adapted 'to convert the radiall)v inward movement ot` the `former member into 'a radiall)- outward movement ot' the latter member, the distance ot' the wheel Center from theground being constant for all positions of the bearing members. n v. v

In testimon)v whereof l atiix mvsigmiture. in presence of two witnesses. n

WILLIAM L. v MART I N. ll'vitnesses l-laiuir D. Hanson', A. E. 'Winnen 

